Wire-stitcher feed



March 31, 1931. J. N. PAGLIARUL 1,798,898

WIRE STITCHER FEED Filed July 10. 1929 2 Sheets-Sheet 1 I N VEN TOR.

BY I t March 1931' J. N. PAGLIARUL WIRE STITCHER FEED 2 Sheets-Sheet 2 Filed July 10, 1929 11 INVENTOR.

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TTORNEYJ Patented Mar. 31, 1931 UNITED STATES PATENT? OFFICE JOSEPH N PAG-LIABUL, F MILWAUKEE, WISCONSIN wmE-s'rI'ronEn rnnn Application filed July 10,1929. Serial m. 377,218.

ple mechanism for expeditiously varying the feed of the wire, to thus enable the machine to be readily adjusted for making and driving staples ofditferent sizes to suit the thickness of the piece of work in hand, as more fully hereinafter set forth.

In the drawings annexed i Fig. 1 is a side view of the head of the stitching machine showing my invention applied thereto;

Fig. 2 is an edge elevation of the same; Figs. 3, 4, Band 6 are views of details hereinafter described; a

Fig. Tie a front view of a modified form of feed wheel and disk; and

Fig. 8 is a horizontal sectional view thereof. i m

Referring to the annexed drawings by reference numerals, l designates a spool carrying a length ofwire 2 which is usually flat in cross-sectioni From the spool, the wire extends through a yielding guide-member 3 having a brake-member 4 which bears against the side of the spool 1. From the guide 3, the wire passes down through a tensioning device 5 of known construction and thence downbetween a pair of feed-wheels 6 and 7. After the wire leaves the feed-wheels, it

a5 cleaning and oiling roller 9, and thence to which lies andslides against the front face of the member 15 of the head frame andis provided with a forwardly-projecting jour passes through a curved guide 8, under a nal-pin'16on which the feed-wheel 7 is jour naled. The other arm-17 of the bell-crank extends inwardly and is normally depressed by means of an expansible coil-spring 18, so that the outer feed-wheel 7 is constantly pressed toward the periphery of the innerfeed-wheel 6.

To obtain an intermittent feed in the ordinaryconstructions now in use, only a portion of the periphery of the inner feed-wheel 6 is employed. This portion is formed by providing the periphery ofthe whecl 6 with an enlarged segmental portion 21. When this enlarged segmental portion gets opposite the adjacent periphery of the companion feedwheel, it grips the wire against the periphery of said companion feed-wheel and advances the wire a distance equal to the length of the surface of the segmental portion; then, as the tail-end of this'scgmental portion 21 passes below the plane of the axes of the two feed-wheels, the feed stops and is resumed again only when the feed-segment 21 again comes around to a position to grip the wire.

WVithout mechanism suchas thatnow' to be described, it will be observed that the feed of the wire would be in allcases uniform, correspondin to the length ofthe peripheral gripping-face of the segment 21. In other words, it would be impossible to vary the feed without removing the feed-Wheel 6 and substituting therefor another wheel having either a shorter or a longer feed-segment. To avoid the expense and delay incident to stopping the machine tothus change feed-wheels and keeping in stock aset of different-sized feed-wheels I apply to thefced-wheol 6 a gage-disk 22. i

This'gage-disk 22 lies flat against the outer face of the feed-wheel 6 and is journaled concentrically therewith on a pin 23 projecting from the face of the feed-wheel 6 and held in an adjustable position by a bolt 24:. A knob 24 is provided on "the gage-disk for convenience in relatively adjusting it on said journal in 23. The peripheryof this gagedisk22 s positioned so as to run on the periphery of the feed-wheel 7, The major portion of the gage-disk 22 is of larger radius than the feeding segment 21. One third'of the periphery of the disk 22 is cut below its major radius to equal a radius less than that of feeding segment 21, and this part is cam shaped to gradually decrease in diameter, so that when power is applied to the machine, the cam shaped part permits the feed-wheel 7 to gradually approach its proper operative position. The larger portion of the gage disk 22 serves to overlap feeding segment 21 for difierent sized staple, and disengaging the two rollers will stop feeding.

Thus, when that part 27 of gage-disk 22, which is of less diameter, is adjusted coincident with feed segment 21, as shown in Fig. 3, feed-wheel 7, when it runs off the main portion of the periphery of the gage-disk 22, will gradually drop to a position to contact with segment 21, gripping the wire, and the feeding action takes place and continues until the greater diameter portion 27 of the gage-disk 22 engages the feed-wheel 7, which, as explained, has a radius larger than the feeding segment 21,:and forces said feedwheel? to the left,thus releasing the tension on the wire and stopping the feeding operation.

In Fig. 3, it will be observed that the gagedisk portion of larger diameteris adjusted to overlap about one-third of the rear end of the feed-segment 21 and thus reduce the feed to alength equal to about two-thirds of the feeding-face of said segment. To facilitate the .adjustment of the gage-wheel, I provide the face of the larger or greater diameter segment 27 with a gage mark 28, and I also provide the feed-segment 21 with a scale 29. The gage-disk is also providedwith a se mental slot 80, and a screw 31 extending through the slot and threaded into the wheel 6 limits the adjustment of the disk 22 and also serves to hold the;disk in adjusted position.

In the modified form shown in Figs. 7 and 8, the feed wheel 6 is adjustable on the shaft 23, and the disk 22 is provided with a square hole 32 to lit the squared portion 33 of the shaft 23 and has a fixed relation therewith. The disk 22' is provided with a segmental slot 30 and a screw 31 extending through the slot and threaded into thefeed wheel 6 provides for adjusting the feed wheel with relation to the disk. In both forms, the circumferential length of the feed wheel segment of greater radius exposed determines the length of the wire fed for each revolution of the feed wheel.

From the foregoing description, it will be seen that the apparatus is of very simple construction, and is well adapted for the purposes described.

What is claimed as new is: j V

1. An apparatus for intermittently feeding wire embodying a pair of synchronouslydriven feed-wheels, means for resiliently pressing these wheels towardeach other to.

grip the wire, and means including a wheel having a portion of larger diameter than the feed wheels for varying the gripping feed period.

2. An apparatus for intermittently feeding wire embodying a pair of synchronouslydriven feed-wheels, means for resiliently pressing these wheels toward each other to grip the wire, and means for varying the gripping feed period embodying a gripping segment on one of said wheels, and a disk having a portion of larger diameter than the feed wheels and rotatively adjustable to vary the effective length of said feeding-segment.

3. An apparatus for intermittently feeding wire embodying a pair of positivelydriven feed-wheels one of whichis provided with a peripheral feed-segment which limits the length of feed of the wire, means for resiliently pressing thewheels toward each other, a device for limiting this movement of the wheels toward each other, a rotatively-adjustable gage-disk mounted on the wheel carrying the feed-segment and having a portion of larger diameter than the feed wheels and a cut-out portion in its periphery to reduce the radius of the disk at that point less than the diameter of the feed wheels, for the purpose set forth. 7,

4:. An apparatus for intermittently feeding wire embodying a. pair of feed members one of which isin the form of a rotary wheel, means for resiliently biasing one of the members towards the other to grip the wire therebetween for predetermined periods, and means including a wheel having a portion of larger diameter than the feed wheels for adjusting the lengths of the periods. 7 r

5. An apparatus for feeding wire embodying a pair of feed members one of which is in the form of a rotary wheel having segmental portions of different diameters for intermittently feeding the wire, means for resiliently biasing one of the members towards the other, and means including a wheel having a portion of larger diameter and another portion of smaller diameter for adjusting the effective peripheral length of the wire engaging part of the segmental portion of the wheel to vary the length; of the wire feed.

6. .An I apparatus for feeding wire, embodying a pair of feed members one of which is in the form of a rotary segmentof a wheel, means for resiliently biasing one of the members towardsthe other to grip wire therebetween, and a segmental disk of larger diameter than the segment of the wheel adjustably overlapping the segment 1 of the wheel to adjust the effective length of the wheel segment to vary the length of the wire fed.

7. An apparatus for feeding wire e ody. ing a pair of drivenrollers for feeding wire therebetween, means for resiliently biasing one of the rollers towards the other, one of said rollers having a segmental portion which engages the Wire to intermittently feed the same, and a disk circumferentially acljustably mounted on the segmental Wheel and having a segmental portion of larger diameter than the segmental portion of the wheel and engaging the biased roller for adjusting the effective peripheral length of the segmental portion of the wheel.

In testimony whereof, I aflix my signature.

JOSEPH N. PAGLIARUL. 

